The Jolt/Volt Combo is the ultimate lighting accessory for any traveler. The ultra-compact USB-chargeable Jolt light is a handy accessory and can be used as a key chain for ultimate portability. When paired with the Volt car charger, the Jolt can be charged on the go so you'll always be charged wherever you're going! The Volt can also be used to charge other USB devices through your car's 12 volt outlet.